Sentences with word «subduction»

State geologists analyze projected impacts of Cascadia Subduction Zone earthquake, magnitude 9.0, and expect tens of thousands of casualties in the...
U.S. Geological Survey scientist Jeanne Hardebeck calculated the frictional strength of subduction zone faults worldwide, and the stresses they are under.
However, the seismic potential of crustal faults within the forearc of the northern Cascadia subduction zone in British Columbia has remained elusive.
Thus, the study could improve the understanding of the geochemical processes in subduction zones of the earth.
Both these analyses showed that zircons from as far back as 4.38 billion years ago crystallized in relatively cool conditions, such as at subduction zones where water and magma interact at the intersection of tectonic plates.
In high - pressure and high - temperature X-ray measurements that were partly conducted at DESY, scientists created conditions similar to those in so - called subduction zones where an oceanic plate dives under the continental crust.
And all countries around the world that sit on subduction zones may now need...
Highly destructive earthquakes caused by subduction occur because of excessive friction that develops during the sliding process, resulting in a build - up of stress.
There's more on the threat to the Northwest from the Cascadia subduction fault in this video discussion by Oregon State University emeritus geosciences professor Bob Yeats:
Data analysis and modelling suggest that varying uplift rates along subduction margins are mainly a short - term phenomenon.
A University of Tokyo research group has discovered slow - moving low - frequency tremors which occur at the shallow subduction plate boundary in Hyuga - nada, off east Kyushu.
The findings, published in Nature Geoscience on Nov. 20, are important for understanding factors that influence earthquake and tsunami generation in Cascadia and at other subduction zones around the world.
Meng says the findings show that quakes can grow to large, potentially dangerous magnitudes far from subduction zones by jumping from fault to fault.
«Understanding the thickness of the plate is important to understanding how plates move around, both when they form at mid-ocean ridges and later on when the material goes back down into the Earth through subduction zones such as those in Cascadia, the Andes, Japan and Indonesia,» said Warren, assistant professor in the Department of Geological Sciences in the College of Earth, Ocean, and Environment.
The transport and release of water during subduction causes strong volcanic activity.
Vasiliki Mouslopoulou says: «It is not unlikely that coastlines along active subduction margins with no detectable tectonic uplift over the last 10,000 years will accommodate bigger than M7 earthquakes in the near future.»
The Earth's lithosphere is divided into several plates that are in constant motion, and today's geologists have a good understanding of what drives these plate movements: heavier ocean plates are submerged beneath lighter continental plates along what are known as subduction zones.
Recent fieldwork in Alaska's Aleutian Islands suggests that a presently «creeping» section of the Aleutian Subduction Zone fault could potentially generate an earthquake great enough to send a large tsunami across the Pacific to Hawaii.
This finding has applications to the seismic hazard of these regions, as it highlights the potential for future damaging earthquakes and tsunamis at active subduction margins with no measurable recent uplift.
Megathrust earthquakes can generate destructive tsunamis and are a serious hazard facing communities located near subduction zones.
Biological processes like photosynthesis preferentially take 12C out of the air in the form of CO2, while geological processes like subduction of the Earth's crust take anything that's part of the rock.
Magmas formed above subduction zones contain important amount of water that is essentially degassed during volcanic eruptions or upon magma cooling and solidification at depth.
The Santa Cruz Islands are less than five million years old, and were pushed upward by the tectonic subduction of the northward - moving Indo - Australian Plate under the Pacific Plate.
Onno Oncken of GFZ comments: «This is an intriguing finding that changes the stereotype view that all or most great subduction earthquakes occur along the active contact, i.e. plate - interface, of the two converging plates.
Subduction causes melting deep below Earth's surface, and creates pools of magma.
Uplift is common along the coastlines of continents at subduction systems worldwide (e.g., Kamchatka, Japan, New Zealand and Papua New Guinea) with rates of vertical uplift accrued over the last 10,000 years being generally higher — up to ten times more than for time intervals larger than 125,000 years.
There it will seek out new species and habitats; it may also study subduction zones, where oceanic crust is recycled back into the earth's mantle.
Scientists analyzing the cracks and ridges on Europa's surface find that its icy skin is also slowly recycled through a process similar to continental subduction on Earth, with one icy plate slipping and buckling under the edge of another.
The simulations show that mantle plumes and the weaknesses they create could have actually initiated the first subduction zones.
Instead, the new finding adds evidence that gravity pulling the plates into subduction zones may drag them across the globe.
Scientists don't know how subduction got started in the first place, but water may be a necessary ingredient.
Further sensitivity studies with a climate model (CESM) in which extra-tropical cloud albedo is systematically varied illustrate the influence of cloud albedo perturbations, not only directly above the oceanic subduction regions but across the extra-tropics, on the equatorial bias.
Plate reconstruction models generally agree that about 130 million years ago, there was a peak in the amount of subduction happening.
The core complex is located within a continental rift and was exhumed at a rate of approx. 0.75 to 1.3 km per million years during the main phase of oceanic subduction of the Arabian plate beneath the Central Iranian block between ca. 30 and 49 million years ago.
These initial results provide fundamental insights into the behavior of rare, very large earthquakes that may aid in preparation and early warning efforts for future tsunamis following subduction zone earthquakes.
They simulated earthquakes with magnitudes between 9.0 and 9.6 originating at different locations along the Aleutian - Alaska subduction zone, a 3,400 - kilometer (2,113 - mile) long ocean trench stretching along the southern coast of Alaska and the Aleutian Islands where the Pacific tectonic plate is slipping under the North American plate.
Further, it alerts scientists that earthquake clustering may not only characterise shallow faulting and smaller - sized earthquakes with magnitudes lower than M7 but it is a property of large subduction earthquakes.
«Measuring the strength of olivine is critical to understanding how strong tectonic plates are, which, in turn, matters to how plates break and create subduction zones like those along the Cascadia plate, which runs down the west coast of Canada to the west coast of the United States,» said Warren, a geologist in the College of Earth, Ocean, and Environment.
The study also increased the frequency of the most massive earthquakes, where the entire subduction zone ruptures at once.
Evidence for subduction in the ice shell of Europa.
Because the South American subduction zone is so wide, it provides much resistance to migrate laterally, in particular in the centre.
The focus was on the Nankai Trough, one of three major subduction zones offshore of Japan.
The powerful shaking from several recent subduction zone earthquakes around the world — notably the 9.0 - magnitude Tohoku earthquake in 2011 and the 8.2 - magnitude quake off the coast of Chile in 2014 — and geologic evidence from deep - sea cores of powerful quakes in the past now suggest that southern Cascadia could experience an earthquake as powerful as magnitude 9.3.

Phrases with «subduction»

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